Condenser.



E'QJ. NEWTON.

CONDENSER.

APPLIOATION FILED M01728, 1906.

gsfi ggaa Patented Oct. 5, 1909.

6 2% 264.. Fran/r M Afe Wm? UNITED STATES PATENT OFFICE.

FRANK J. NEWTON, OE SCHENECTADY, NEW YORK, ASSIONOR TO GENERAL ELECTRICCOMPANY, A CORPORATION 01 NEW YORK.

CONDENSER.

Specification of Letters Patent.

Patented Oct. 5, 1909.

Application filed November 8, 1908. Serial No. 342,476.

To all whom it may concern:

Be it known that I, FRANK J. NEWTON, a citizen of the United States,residing at Schenectady, county of Schenectady, State of New York, haveinvented certain new and useful Improvements in Condensers, of which thefollowing is a specification.

My present invention relates to electrical condensers, and consists of adevice comprising a plurality of metal plates insulated with enamel andso arranged that the apparatus is compact and easy to build, and alsodurable and eflicient in operation.

Figure l is an elevation partly in section showing the condenserassembled ready for use; Fig. 2 is a sectional elevation on the line 2,2 of Fig. 1; and Fig. 3 shows one of the metal plates used to build upthe structure shown in Fig. 1.

The condenser is assembled on a non-conducting rod 1 of fiber orvulcanized rubber, and comprises non-conducting end plates 2 and 3between which a plurality of metal plates 4 are securely clamped. Thesemetal plates are of the general outline shown in Fig. 3 and are eachprovided with a lug 5 adapted to slip over conductive rods or wires 6and 7 to complete electrical connection between the plates and thecircuit with which the condenser is to be used. By arranging alternateplates with the lugs uppermost and the other plates with their lugsdownward, half of the plates may be connected to an electrical source ofone polarity, while the intermediate plates are connected to theopposite side of the source.

It is, of course, necessary that successive plates of the series shouldbe insulated from each other and instead of using paper or othermaterials heretofore commonly used in electrical condensers, I rely on acoating of enamel applied directly to the lates of the condensers. Thisenamel may fie of the general type described in United States Pat-- entNo. 806,574, Rupley, December 5, 1905, and may be applied according tothe eneral method disclosed in that patent by ipping the plates in theliquid'material and then heatin or baking to d and harden the ename Suchcoatings 0 not readily carbonize even when operated at relatively hightemperatures and are in other ways well suited for use as the dielectricof electrical condensers.

To insure good electrical connection between the plates and theconducting rods 5 and 6 which pass through the lugs of the plates, I mayleave the lugs uncoated or I may coat them and then scrape away orotherwise remove the coating, to secure the desired electrical contact.The enamel may be applied to all the plates of the series or only toalternate plates and several coatings may be used on each plate tosecure the desired resistance and disruptive stren h.

The efliciency of a condenser and its e cotrostatic capacity depends onthe nature and thickness of the dielectric as well as on the materialand area of the conductors or armatures, and as the coating of enamelabove described may be only a fraction of a mill in thickness, it isapparent that the armatures of the condenser are closely associated andarranged to give a high electrostatic capacity.

The metal disks or armatures of the condenser may be of thin aluminum incase a light weight condenser is desired, or they may be of iron orother cheap conductive material.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is,

1. An electrical condenser comprising a plurality of enameled metalplates pierced by non-conductive clamping means and rigidly securedthereby.

2. An electrical condenser comprising a plurality of metal plates, someat least of which are enameled, an electrical conductor, and lugsconnecting alternate plates to said conductor.

3. An electrical condenser comprising a plurality of metal plates someat least of which are covered with adherent insulating material, lugs onsaid plates for engagement with electrlcal conductors, and clampingmeans passin through the body of said plates for hol ing them inposition.

4. An electrical condenser of cylindrical form, comprising a centralnon-conductive clamping member carrying rigid end meme passing throughsome of said lugs to make bers between which a plurallt of enameledelectrical connection with said plates. metal plates are clamped, an lus on sand In witness whereof, I have hereunto set metal plates toconnect said p ates with my hand this 6th day of November, 1906.electrical conductors.

5. An electrical condenser comprising a FRANK NEWTON plurality of metalplates, some at least of Witnesses: which are enameled, lugs on saidplates, and BENJAMIN B. HULL,

a plurality of parallel conductive rods each HELEN QRFQRD.

